Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb76ad992a8f9fb…

MALICIOUS

PDF

76.5 KB Created: 2021-03-29 08:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c0ab9572a95521c8290d0336d6289283 SHA-1: fb26dc2e0134cb37d98bd10f36fd8d93e0ae7999 SHA-256: 9eb76ad992a8f9fb754514938130a3a6b5a8fef150d79ef75cec65085545e377
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The embedded URLs point to sites that likely host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=lemon+aid+used+car+guide+2020 PDF link annotation
    • https://napokepuwaju.weebly.com/uploads/1/3/1/1/131164128/dokalami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_600498073829c.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/diiKji5/19071916704.pdfIn PDF document text
    • https://nugezufetewivu.weebly.com/uploads/1/3/4/5/134598593/pitegewib-xisepor-segetixitifesap-tomipidutawoxan.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/hgeGdhb/dilamazubitobe.pdfIn PDF document text
    • https://ximizewilaxeju.weebly.com/uploads/1/3/1/3/131381769/rerojuwukipudis-kuwipalow.pdfIn PDF document text
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/abfb91beffd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374983/normal_6005b5e1d2943.pdfIn PDF document text
    • http://gozatelaji.22web.org/birthday_photo_editor_for_pc.pdfIn PDF document text
    • https://mixidesurujof.weebly.com/uploads/1/3/4/9/134902607/lofasof.pdfIn PDF document text
    • http://nizuloxodiza.iblogger.org/fuvuwivepodarulilisez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74272d8-1538-4214-8d67-92a26840e627/webitewusoded.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/dental_hygiene_printable_worksheets.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_1250c3e9c3db40abb17e0f5911fbf1d4.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_b132f65dca504b96bcf068250f183a44.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_71481c9848ad40ddbd1432f055f30c26.pdf?index=trueIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_3d158ace7dd543a985301604d1c100ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4189ae12-c86b-4538-9c47-cdb162a8e34e/18958691094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/408f472c-95df-43fa-b922-d0d8fee76f7c/lewatinamed.pdfIn PDF document text
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_65f127526a28412b9ca9e62a4b006e42.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 5440 bytes
SHA-256: d3b5857e689dba9ce87fe931eecbe41e14db1fc69c55355839e943026d44519a
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 10524 bytes
SHA-256: fcbac0b8101f5858d69833774e6b9380270db83c7c291a995404c2d6462073d8

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